package com.example.yls.demoa;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by yls on 2019/5/17.
 */

public class wuziqi extends View {
    private  int mPaneWidth;
    private  float mLineHeight;
    private int MAX_COUNT_IN_LINE=5;
    private  int MAX_LINE=10;
    private Paint mPaint=new Paint();
    private Bitmap mWhitePiece;
    private Bitmap mBlackPiece;
    private  float ratioPieceOfLineHeight=3*1.0f/4;
    private List<Point> mWhiteArray=new ArrayList<>();
    private List<Point> mBlackArray=new ArrayList<>();
    private boolean mIsWhite=true;
    private boolean mIsGameOver;
    private boolean ismIsWhiteWinner;

    public wuziqi(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        setBackgroundColor(0x44ff0000);
        init();
    }

    private void init() {
        mPaint.setColor(0x88000000);
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        mPaint.setStyle(Paint.Style.STROKE);
        mWhitePiece= BitmapFactory.decodeResource(getResources(),R.drawable.stone_w2);
        mBlackPiece= BitmapFactory.decodeResource(getResources(),R.drawable.stone_b1);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        drawBoard(canvas);
        drawPieces(canvas);
        checkGameOver();
    }

    private void checkGameOver() {
        boolean whiteWin=checkFiveInLine(mWhiteArray);
        boolean blackWin=checkFiveInLine(mBlackArray);
        if(whiteWin||blackWin){
            mIsGameOver=true;
            ismIsWhiteWinner=whiteWin;
            String text=ismIsWhiteWinner?"白色赢了":"黑色赢了";
            Toast.makeText(getContext(), text, Toast.LENGTH_SHORT).show();
        }

    }
    private  boolean checkFiveInLine(List<Point> points){

    for(Point p:points){
        int x=p.x;
        int y=p.y;

        boolean win=checkHorizontal(x,y,points);
        if(win) return  true;
       win= checkVetical(x,y,points);
        if(win) return  true;
        win=checkLeftDiagonal(x,y,points);
        if(win) return  true;
        win=checkRightDiagonal(x,y,points);
        if(win) return  true;

    }
        return false;
    }

    private boolean checkVetical(int x, int y, List<Point> points) {
        int count=1;
        for (int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x,y-i))){
                count++;
            }
            else
            {
                break;
            }

        }
        for (int i=1;i<MAX_COUNT_IN_LINE;i++) {
            if (points.contains(new Point(x , y+i))) {
                count++;
            } else {
                break;
            }
        }
        if(count==MAX_COUNT_IN_LINE)
        {return true;}
        return  false;
    }
    private boolean checkLeftDiagonal(int x, int y, List<Point> points) {
        int count=1;
        for (int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i,y+i))){
                count++;
            }
            else
            {
                break;
            }

        }
        for (int i=1;i<MAX_COUNT_IN_LINE;i++) {
            if (points.contains(new Point(x+i , y-i))) {
                count++;
            } else {
                break;
            }
        }
        if(count==MAX_COUNT_IN_LINE)
        {return true;}
        return  false;
    }
    private boolean checkRightDiagonal(int x, int y, List<Point> points) {
        int count=1;
        for (int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x+i,y+i))){
                count++;
            }
            else
            {
                break;
            }

        }
        for (int i=1;i<MAX_COUNT_IN_LINE;i++) {
            if (points.contains(new Point(x-i , y-i))) {
                count++;
            } else {
                break;
            }
        }
        if(count==MAX_COUNT_IN_LINE)
        {return true;}
        return  false;
    }

    private boolean checkHorizontal(int x, int y, List<Point> points) {
        int count=1;
        for (int i=1;i<MAX_COUNT_IN_LINE;i++){
            if(points.contains(new Point(x-i,y))){
                count++;
            }
            else
            {
                break;
            }

        }
        for (int i=1;i<MAX_COUNT_IN_LINE;i++) {
            if (points.contains(new Point(x + i, y))) {
                count++;
            } else {
                break;
            }
        }
        if(count==MAX_COUNT_IN_LINE)
        {return true;}
        return  false;
    }

    private void drawPieces(Canvas canvas) {
        for(int i=0,n=mWhiteArray.size();i<n;i++){
            Point whitePoint=mWhiteArray.get(i);
            canvas.drawBitmap(mWhitePiece,(whitePoint.x+(1-ratioPieceOfLineHeight)/2)*mLineHeight,(whitePoint.y+(1-ratioPieceOfLineHeight)/2)*mLineHeight,null);
        }
        for(int i=0,n=mBlackArray.size();i<n;i++){
            Point BlackPoint=mBlackArray.get(i);
            canvas.drawBitmap(mBlackPiece,(BlackPoint.x+(1-ratioPieceOfLineHeight)/2)*mLineHeight,(BlackPoint.y+(1-ratioPieceOfLineHeight)/2)*mLineHeight,null);
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if(mIsGameOver){
            return false;
        }
        int action=event.getAction();
        if(action==MotionEvent.ACTION_DOWN){

            int x= (int) event.getX();
            int y= (int) event.getY();
            Point p=getValidPint(x,y);
           if(mWhiteArray.contains(p)||mBlackArray.contains(p)){
               return  false;
           }
            if(mIsWhite){
                mWhiteArray.add(p);
            }
            else
            {
                mBlackArray.add(p);
            }
            invalidate();
            mIsWhite=!mIsWhite;
            return true;
        }

       return super.onTouchEvent(event);
    }

    private Point getValidPint(int x, int y) {

        return new Point((int)(x/mLineHeight),(int)(y/mLineHeight));
    }

    private void drawBoard(Canvas canvas) {
        int w=mPaneWidth;
        float lineHeight=mLineHeight;
        for(int i=0;i<MAX_LINE;i++){
            
            int startX= (int) (lineHeight/2);
            int endX= (int) (w-lineHeight/2);
            int y= (int) ((0.5+i)*lineHeight);
            canvas.drawLine(startX,y,endX,y,mPaint);
            canvas.drawLine(y,startX,y,endX,mPaint);

        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        mPaneWidth=w;
        mLineHeight=mPaneWidth*1.0f/MAX_LINE;
        int pieceWidth= (int) (mLineHeight*ratioPieceOfLineHeight);
        mWhitePiece=Bitmap.createScaledBitmap(mWhitePiece,pieceWidth,pieceWidth,false
        );
        mBlackPiece=Bitmap.createScaledBitmap(mBlackPiece,pieceWidth,pieceWidth,false
        );

    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int widthSize =MeasureSpec.getSize(widthMeasureSpec);
        int widthMode=MeasureSpec.getMode(widthMeasureSpec);
        int heightSize =MeasureSpec.getSize(heightMeasureSpec);
        int heightMode=MeasureSpec.getMode(heightMeasureSpec);

        int width=Math.min(widthSize,heightSize);
        if(widthMode==MeasureSpec.UNSPECIFIED){
            width=heightSize;
        }
        else if(heightMode==MeasureSpec.UNSPECIFIED){
            width=widthSize;
        }
        setMeasuredDimension(width,width);
    }
}
